配置全局日期和时间格式

ChatGPT-4o 中英对照 Configuring a Global Date and Time Format

默认情况下，未使用 @DateTimeFormat 注释的日期和时间字段会通过 DateFormat.SHORT 样式从字符串转换。如果您愿意，可以通过定义自己的全局格式来更改此设置。

要做到这一点，确保 Spring 不注册默认的格式化器。相反，可以借助以下方法手动注册格式化器：

• org.springframework.format.datetime.standard.DateTimeFormatterRegistrar

• org.springframework.format.datetime.DateFormatterRegistrar

例如，以下配置注册了一个全局的 yyyyMMdd 格式：

Java

@Configuration
public class ApplicationConfiguration {

    @Bean
    public FormattingConversionService conversionService() {

        // Use the DefaultFormattingConversionService but do not register defaults
        DefaultFormattingConversionService conversionService =
                new DefaultFormattingConversionService(false);

        // Ensure @NumberFormat is still supported
        conversionService.addFormatterForFieldAnnotation(
                new NumberFormatAnnotationFormatterFactory());

        // Register JSR-310 date conversion with a specific global format
        DateTimeFormatterRegistrar dateTimeRegistrar = new DateTimeFormatterRegistrar();
        dateTimeRegistrar.setDateFormatter(DateTimeFormatter.ofPattern("yyyyMMdd"));
        dateTimeRegistrar.registerFormatters(conversionService);

        // Register date conversion with a specific global format
        DateFormatterRegistrar dateRegistrar = new DateFormatterRegistrar();
        dateRegistrar.setFormatter(new DateFormatter("yyyyMMdd"));
        dateRegistrar.registerFormatters(conversionService);

        return conversionService;
    }
}

java

Kotlin

@Configuration
class ApplicationConfiguration {

    @Bean
    fun conversionService(): FormattingConversionService {
        // Use the DefaultFormattingConversionService but do not register defaults
        return DefaultFormattingConversionService(false).apply {

            // Ensure @NumberFormat is still supported
            addFormatterForFieldAnnotation(NumberFormatAnnotationFormatterFactory())

            // Register JSR-310 date conversion with a specific global format
            val dateTimeRegistrar = DateTimeFormatterRegistrar()
            dateTimeRegistrar.setDateFormatter(DateTimeFormatter.ofPattern("yyyyMMdd"))
            dateTimeRegistrar.registerFormatters(this)

            // Register date conversion with a specific global format
            val dateRegistrar = DateFormatterRegistrar()
            dateRegistrar.setFormatter(DateFormatter("yyyyMMdd"))
            dateRegistrar.registerFormatters(this)
        }
    }
}

kotlin

Xml

<bean id="conversionService" class="org.springframework.format.support.FormattingConversionServiceFactoryBean">
    <property name="registerDefaultFormatters" value="false" />
    <property name="formatters">
        <set>
            <bean class="org.springframework.format.number.NumberFormatAnnotationFormatterFactory" />
        </set>
    </property>
    <property name="formatterRegistrars">
        <set>
            <bean class="org.springframework.format.datetime.standard.DateTimeFormatterRegistrar">
                <property name="dateFormatter">
                    <bean class="org.springframework.format.datetime.standard.DateTimeFormatterFactoryBean">
                        <property name="pattern" value="yyyyMMdd"/>
                    </bean>
                </property>
            </bean>
        </set>
    </property>
</bean>

xml

请注意，在配置 web 应用程序中的日期和时间格式时有额外的注意事项。请参阅 WebMVC 转换和格式化 或 WebFlux 转换和格式化。